Low pressure jet nozzle and optimized jet pattern for mixing process water in crude oil

An apparatus comprising a conduit having a bore for conveying a multiphase fluid extending from an inlet of the conduit to an outlet of the conduit, an external pump, and a hollow annular insert extending at least partially into the conduit, the hollow annular insert comprising an insert wall enclosing a insert bore in fluid communication with an insert inlet, and a plurality of ducts disposed within the insert wall, such that the insert bore is in fluid communication with the conduit via the plurality of ducts, the plurality of ducts each comprising:

• an intake portion operable to receive a process fluid from the insert bore and defining a first interior diameter;
• a discharge portion operable to discharge the process fluid and defining an annular bore forming a second interior diameter smaller than the first interior diameter, wherein the annular bore is operable to form a flow of the process fluid into a fluid column;
• and
• a taper portion intermediate the intake portion and the discharge portion, the taper portion defining a third internal diameter decreasing from a first end of the taper portion coupled to the intake portion to a second end of the taper portion coupled to the discharge portion, such that the flow of the process fluid is accelerated between the intake portion and the discharge portion.

A method, comprising:

• routing a multiphase fluid into a pipe of a fluid mixing device, the pipe having a pipe wall and an axial bore that extends from an inlet of the pipe to an outlet of the pipe for conveying the multiphase fluid through the pipe from the inlet of the pipe to the outlet of the pipe, wherein the fluid mixing device further comprises a sleeve disposed about the pipe, a cavity provided between an exterior surface of the pipe and an interior surface of the sleeve, wherein the cavity and the axial bore of the pipe are in fluid communication with one another via a plurality of openings through the pipe wall, and the plurality of openings through the pipe wall are located between the inlet of the pipe and the outlet of the pipe, the plurality of openings each comprising:
• an intake portion operable to receive a mixing fluid from the cavity and defining a first interior diameter,
• a discharge portion defining an annular bore forming a second interior diameter smaller than the first interior diameter, wherein the annular bore is operable to form a flow of the external fluid into a fluid column, and
• a taper portion intermediate the intake portion and the discharge portion, the taper portion defining a third internal diameter decreasing from a first end of the taper portion coupled to the intake portion to a second end of the taper portion coupled to the discharge portion, such that the flow of the external fluid is accelerated between the intake portion and the discharge portion;
• routing the mixing fluid into through the cavity and into the intake portions of the plurality of openings via an external pump fluidly coupled to an inlet of the cavity;
• and
• jetting the mixing fluid directly into the pipe via the discharge portions of the plurality of openings to mix components of the multiphase fluid with one another, wherein the mixing fluid is accelerated along the taper portion and formed into a fluid column by the annular bore of the discharge portion.